add support for custom configuration

www/nginx/src/opnsense/service/templates/OPNsense/Nginx/streams.conf

@@ -83,6 +83,8 @@
         ssl_prefer_server_ciphers on;
 {%   endif %}
 
+        include {{ server['@uuid'] }}_pre/*.conf;
+        
 {%   if server.route_field == 'upstream' %}
 {%     if server.upstream is defined %}
 {%       set upstream = helpers.getUUID(server.upstream) %}
@@ -105,6 +107,8 @@
 {%     endfor %}
 {%   endif%}
 
+        include {{ server['@uuid'] }}_post/*.conf;
+
     }
 {% endfor %}
 {% endif %}